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e8da699cbf
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face2d85f8
@ -0,0 +1,20 @@
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Disc = Struct.new(:positions, :start_position) do
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def position_at(time)
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(start_position + time) % positions
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end
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end
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discs = DATA.each_line.map {|line|
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/Disc #\d has (?<positions>\d+) positions; at time=0, it is at position (?<position>\d+)./ =~ line
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Disc.new(positions.to_i, position.to_i)
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}
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p (0..Float::INFINITY).find {|t|
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discs.each.with_index.all? {|disc, index|
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disc.position_at(t + index) == 0
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}
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}
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__END__
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Disc #1 has 5 positions; at time=0, it is at position 4.
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Disc #2 has 2 positions; at time=0, it is at position 1.
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